Pronunciation: (wun'īd"), [key]
1. having but one eye.
2. Cards.being, of, pertaining to, or using a face card or cards on which the figure is shown in profile, such cards being the jack of spades, the jack of hearts, and the king of diamonds in standard packs of cards: One-eyed jacks are wild.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.